//package test;
//import java.io.BufferedInputStream; 
//import java.io.BufferedReader; 
//import java.io.IOException; 
//import java.io.InputStreamReader; 
//import java.util.regex.Matcher; 
//import java.util.regex.Pattern; 
// 
//public class list { 
// 
////    public static void main(String[] args) throws IOException { 
////      BufferedReader( new InputStreamReader(new BufferedInputStream(System.in)) ); 
////            System.out.print("\nEnter your regex: "); 
////            Pattern pattern = Pattern.compile("\\bof\\b"); 
////            System.out.print("Enter input string to search: "); 
////            Matcher matcher = pattern.matcher("The day of birth is called birthday"); 
////            boolean found = false;
////            System.out.println(matcher.find());
//////            while (matcher.find()) { 
//////                System.out.println("I found the text \"" + matcher.group() + 
//////                        "\" starting at index " + matcher.start() + 
//////                        " and ending at index " + matcher.end() + 
//////                        "."); 
//////                found = true; 
//////            } 
//////            if (!found) { 
//////                System.out.println("No match found."); 
//////            } 
////       
////    } 
//}